Brake mechanism for looms



- 1 I Oct 927 'A. s. JOHNSON I BRAKE MECHANISM FOR LOUIS Filed July 24. 1925 2 Sheets-Sheet 1 lnv e nTor.

Arfhur Sdohnsbn ATTys.

to A. S. JOHNSON I BRAKE MECHANISM FOR LOOKS Filed July 24. 1925 2 Sheets-Sheet u? .lnvenTor. I Arrhufg-mlohnson I W WW AiTys.

. lmeg y Patented Oct. 25, 1927; r I

estate straw rare-ai I ARTHUR s. Joimson, or I [-IOI EDALE,' MASsecHUsETrs, Assrenon mo VDRABEBQCQR- ma lman, en aem nn, MASSACHUSETTS,IAQOOBIPORATION.,OF MAI E;

nae-KBnewsman-renewa sp tipei file Ji l ,9. PRi JYQQ QBFQ-Q V y 1 Thi in entio re t it pr ements in willsh iv't e iannfini h sh h iil setisi drawings and W111 gbe outin the claims.

braking mechanisms ,ior looms having a brake drunif a co-operating brake and a .spriligr-tictuated device normally tending to apply the brake, a brake, lever and means connecting the brake lever to the hr-ajke api yinsf d v'iw q ra le he t i b ake lever i s re t ru ing p s t n t s e e sa br -applyin e se a n he a i Qft sp n 'lse m nn r a t r l se the brake. In usual constructions theycon nect i on "hetiveen vthe brake lever and the hrake applying device is such" that the Fig 1 a v,slde loom sides showing the brakmg'mecha sin si ppl ed to; th 190. 1 Y

th dimi l 7 elevation of one .ofthe b y ig th P es nt. in entiQn ppl tli ieto; h ,b a le e and i shown in running position I 1F 2 a m ar tie brake lever in stopping position, the

intes the 2 so I i 9W l of h rak ev r w a igh isa d ta id e e atieelq the 15 relatively short "movement or" the brake-apstruction illustrated in 70' device which, unless aocurateadjustnent' of the brake is" provided, W111 permit niore'or lesso't a dragfupon the brake drum.

Furthermore in usual constructions the con- "provide means operable bye brake lever of the usual type tvhiehwill increase-the eflective "range of brake-releasing movement of the brake "lever upon the brakeapplying de-.

Another vide' mechanism for connecting thelh'rake lever tothe, braking drum Whieh will. allow 3 a sufficient amount oflost inotion between "the brake-applying device and the means =connec'tingit tothe brake lever to permit the utilization of the full force of the spring or the brake-applying device. This is 'pern-iit ted in the present'invention-hyreason of the increased range of; efiective brake-releasing movement of the brake lever upon the-brake applyingdevice above mentioned.

I Affurther object 'of theinvention to provide a noveldevice ,for-the fulcrum of the'brake lever. for aceoinplishing thepurposes above mentioned hichcan be applied toa usual-type ofshippe'r stand] -Other objects and featuresof the inven V .tion will Inore fully appear fromjthe 01 lowing description and the accompanying particularly pointed Y Inasmuch asthe lnvention rlates'solel y-to the braking mechanism for loo nsonly so much of the loom structure is illustrated as draivings the inainsliaftd o fj the 1 m is object of the invention is to pro screw :1 which is mountdin the B1661;

h f Fi '1; a d; a

.In. the construction illustrated j in the 20 n ections hetweenthe lorakeilever and the p brake is such that when the brake lever is in journalled' in suitable the logih stopping position the spring of the brakesldes 2, one of vhich is 'shovv'n infthedravvapplying "device is prevented from applying ings; 'A brake drum-3 1 is,fixedlj* secured. 7 its r'ull hraking'torcefl p upon the'niain shaftlfancl ape-operating a 25 One of theolojects of the invention is to brake. 4 in the fonnof aiflelxible ank rep j strapsurrounds the greate'nportion ofcthe' f brake drum 3. One end of-'the'brake,4"'is1 i Which is engage'a'by the end ofan adjusting a. I 11d '00 is 'securedinadjusted position a get "niit 7 the drum 3 and consequentlyfthe afno hooked end l9vvhieh is engaged by ahe; lical spring ao'su fiabiy n o e at t PP 9 were t e 1 9 s e a .wh r hi let li 1 B ad u ti g fp s' i n i b k or plate 5the brake n ayhe-caused ee igage a greaterf'or less amount of 'the surfacfof v p p H u not 9 braking action can befijegulated; The oppo} s itelen d offthe lorake4: isscured-toiafeon' nect'or or link lg' which'in turn ispi'vo'tally nected togaspring aotuated *brakeaRPl YR v v I In the construction illustrated the end O f V I is} .pivotally P mounted upon a stud V 17 p ro' 'jecting from the loom side] Another arm 18o'f the bell ,cra-nk "lever has-a notch'for' mally to depress the arm 18 thereby acting to set the brake upon the drum. The bell "crank lever is provided with another arm 21 which has a laterally extending stud 22 which in prior constructions is directly connected by a link to a stud projecting from the brake lever23. The link connectionin prior con structions is such that the movement of the lever from running. position to stopping position rocks the bell crank lever,which forms the brake-applying device, but a short distance and at times prevents the spring from Hexerting its full braking force upon the 29 onfthe plate 26. V V

the lever27 is provided with a cylindrical boss having an aperture therethrough brake.

The present invention is designed to'increase the effectlve range of brake-releasing movement of the brake lever and also to fprovidemeans whereby the spring 20 may tion to stopping position.

In the preferred embodiment of the invention illustrated herein the brake lever 23 is fulcrumedupon a novel form of post 2% whichis mounted at the lower end of the 'usualshipper bracket 25 which is suitably secured to the loom side. In the construction illustrated in Figs. 1 and 2 a plate 26 ,is fixedly secured to the end of the post 21 and extends laterally therefrom. A lever 27,'having"a longitudinal slot 28 therein or theretlirough, is fulcrumed upon a stud The opposite end of which: receives the laterally bent end of a- Q {connecting member or red 31, the opposite end of which engagesor is connected to the.

stud: 22 on the arm 21 of the bell, crank lever which forms the brake-applying device. Thebrake lever 23 has a laterally extending arm 32 which is provided with a stud 33 extending into the slot 28 of the lever 27 Thestud 33 desirably is provided with an anti-friction roller which slidably and rotatably fits, within the slot 28 in the slotted lever 27. The end of the connecting member or rod 31 desirablyhas, a lost motion connection tothe stud 22.

Inthe preferred embodiment of the in ventionillustrated herein a coupling member 351s provided which has an internally ,screvvthreaded shank 35 mounted upon the screw threaded lower end of the rod 31 so that the coupling member maybe adjusted ,.-to lengthen or shorten the eti'ective'length of-tlierod A lock nut 36 upon the rod 31 serves to retain the shank 35 tightly in position. ,The coupling member 34 has a slot 37 which extends in the direction of the axis of the rod and receives the stud 22 which projects laterally from the arm 21 of the brake-applying bell crank lever. The stud 22also desirably" is provided with a roller 38 which sliclably and rotatable fits within the slot 37.

In the operation of the device the brake lever 23 when moved to starting position, as illustrated in Fig. 1, acting through the stud 33, swings the slotted lever 27 into the position illustrated in Fig. 1 so that the brake, lever rests against an abutment 39 projecting from the shipper stand. l/Vhen in this position the rod 31, which connects the endot' the slotted lever 27 to the stud 22 of the brake-applying device, lies slightly below the pivot or iulcrum of the slotted link 27 upon the plate 26 and also slightly below the fulcrum 24 of the brake 1ever 23. reason 01 this construction the brake lever is effectively locked in running position as illustrated in Fig. 1. It will be obvious that the range of movement of the rod 31, which is'connected' to thebrake-applying lever, is greatly increased over the range of movement produced in usual constructions where the rod 31 directly connects the stud 22 of the brakeapplying device with the stud 33 of the brake lever as the are 01'- movement of the stud 33 in passing from stopping position, illustrated in Fig. 2, to running positionfillustratedV in Fig. 1, is relativelyshort, whereas the movement of the end of the slotted lever 27 is comparatively great by reason of the fact that thelever 27 swings about the fulcrum 29 as it'is actuated by the stud 33 in its arcuate movement and along the slot28 inthe slotted lever 27 By reasonof, this increased eliective range of brake-releasing movement of the'brake leverupon thebrake-ap plying device complete release ofthe brake from efliective engagement with the brake drum is permitted. 7

I [By reason of the lost motion connection between the end of the rodv 31 and the stud :22 on the brake-applying device, which is V permitted by the slotted coupling member 34, the stud 22 is completely removed from engagement with the end of thecoupling, as illustrated in Fig. 2, when theshipperis moved to stopping position, so that the spring 20 is enabled to apply, its iull force to the brake-applying device, and through it to the brake. l I I Z'The particular mechanism for providing a fulcrum for the brake lever and the shipper, and also providing a suitable fulcrum for the slotted lever 27, is illustratedin Figs. and 4 of the drawing. In the constructionillustrated thev ship} er-supporting bracket25 is providedwith a rectangular aperture in which complementary rec tangular section 40 of a fulcrum post for the shipper and" brake'le'v er is mounted; This shipper post is provided with a cylindrical screw'threaded nd 41 which extends through the side of'the shipper bracket and has uponit a clamping nut 42 with a V Washer 43'inter'posed between the nut and the bracket. A sleeve 44: havingarectangular aperture therethrough fitsupon the rectangular portion of the fulcrum post and is provided with a flanged end 45 which abuts against said bracket; The fulcrum post is provided with'a cylindrical section46 the plate'26. Obviously when the nut- 42 is set up the plate 26 is fixedly'secured to the post" in a permanent position. The hub 50 V, of the shipper is pivotally mounted upon the sleeve-4e asis' also the hub 51 of the brake lever; The arm 32 of the brake lever extends laterally'and" the stud 33 therein, with the roller whichis mountedupon it,engages the 1 slot 28 in the slotted lever 27 whichis fulcrumed upon the stud 29.

By reason of this construction the present invention can be readily applied to usual brake constructions forlooms' without ma-:

terial modificationthereof. v 7

,It will be understood thatthe preferred embodiment ofthe invention disclosed in the character and is not restrictive, and that accompanying drawings is of'an illustrative various modifications inform, constructionand arrangement of parts may be made within the spirit and scope of the following claims.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is

v V 1. Braking mechanism for looms having a '7 brakedrum, a co-operating brake,'a springactuated device normally tending to apply the brake, a brake lever, connecting means engaging the brake applying device, and a motion-multiplying connection between the brake lever and the said connecting means;

' 2.- Braking mechanism forlooms having a brake drum, a co-operating brake, a springactuated device normally tending to apply the brake, a brake lever, connecting, means engaging the brake-applying devicefa mo tion-mult-iplying connection between the the brake,- a brake lever, amember pivotally movable upon an axis located at a distance from the fulcrum" of said brake lever, a stud upon said brakelever'movably engaging said member and acting to move the tree end ot said member a greater distance than the range of movement of said stud and a link connecting; the free end of said member to said brake-applying-deviceI f i. firalring'mechanism for looms'hav'ing a brake drum, a (to-operating brake, a spring actuated devicenormally tending toapp lyl the brake, a brake lever, a member pivot-allymovable upon an axis located at a distance from the fulcrum of said brake lever, astud 3 upon said brake lever movably engaging said member and acting to' move the free end ot I said member" a V greater d1stance'thantherange of movement of said stud and alink 3 connecting the free end of said" member to said brake-applying device, the said member'- being so pivoted that when the brake lever is moved torunning'positiom the connecting link will lie slightly below the plane passing on J through the pivot "ofsaid member andthesaidstud, thereby lockingthe brake-apply ing device in" position effectively; to release the brake from engagement with thebrake drum. 7

ogBraking mechanism'for looms having a 1% brake drum, a co-operating brake, a spring-l actuated device normally tending to apply ed upon the shipper stand, a brake lever fulcrumed'upon said post, a plate fixedly se cured to said post, a slotted lever fulcrumed I "the brake and a shipper stand, a post mountat oneend uponsaid plate, means connecting the opposite end of said lever to saidbrake applying device. and a stud'on said brake lever slidably mounted in the "slot inlsaid' lever operable upon movement of said-brake lever to increase the eifectiverange of brake- Y 7 releasing movement of said brake lever uponsaid brake-applying device,

6. Bra-king mechanism-for looms having a brakedrum, a co-operating brake, a springbrake lever and the said-connecting means,

and means normally permitting lost motion brake-applying device, whereby the normal brake-applying movement of said device will not be restricted. 1

3. Braking mechanism for brake drum, a co-operating brake, a springbetween said connecting means and'said looms having a actuated device normally tending to apply actuated device normally tending to apply the brakeand a'shipper stand, a post mounted upon theshipperstand, a brake lever ful crumed upon said post, aplate'fixedly secured to said post, a slotted leverfulcrumed at oneend upon said plate, alink 'pivotallyl connectedatfone endto theopposite end of said slotted lever and having a lost motion connection at itsopposite end to said brakelever to increase the effective rangeofbrakesaid brake-applying device.

,applyingdevice anda stud on said brake 7' lever slidably mounted in the slot insaid lever operable upon movement of" said "brake 7 Braking mechanism for looms having'a;

brake'drum, a co -operating brake, aspring i V actuated device normally tending to apply the brake and a shipper stand, a post having releasing movement of said brake lever upon 5" a rectangular section mounted in a complementary rectangular aperture in said shipper stand, said posthaving screw threaded cylindrical end sections and provided With an intermediate rectangular section mounted in an aperture in said shipper stand having Walls complementary to said rectangular section, a sleeve having inner Walls complementary to said rectangular section, a plate secured to the end of said cvlindrical section and abutting against said s1eeve,a nut upon the opposite end of said post acting to clamp said sleeve and postupon said shipperstand, aslotted lever pivotally mounted upon said plate, a link connecting theopposite end of said'slotted lever to said brakeapplying device and a shipper lever fulcrumed upon said sleeve having a stud slidably mounted in the slot in said slotted lever, whereby. the effective range of brake-releasing movement of said brake lever upon said brake-applying device will be increased.

8. Braking mechanism for looms having a brake drum, aco-operating brake, a springactuated device normally tending to apply the brake and a shipper stand, a'post having a rectangular section mounted in aromplementary rectangular aperture in said shipper stand, said post having SCIQW threaded cylindrical end sections and provided with an intermediate rectangular section mounted in an aperture in said shipper stand havvice including aslotted member engaging a stud upon said brake-applying device. and

adjustably secured upon said link and a shipper lever fulcrumed upon said sleeve having a stud slidably mounted in the slot in said slotted lever, whereby the effective range of brake-releasing movement of said brake lever upon said brake-applying device -Will be increased. I In testimony whereof, I have signed my name to this specification.

ARTHUR s. JoHNso'n, f 

